John Park’s Mad Science Test Tube Rack @adafruit @johnedgarpark #Halloween #adafruit

Build a creepy, glowing test tube display… if you dare. A Feather microcontroller makes the UV LEDs shine to create dazzling effects in the fluorescent pigment-and-water filled test tubes. Easy-to-assemble black iron pipe forms the base of this labware set. The perfect prop for your own haunted house or creepy laboratory.